Light vent unit



FIG. 1 is a perspective view of a light vent unit illustrating my new design;

FIG. 2 is a side elevational view thereof, the other three sides being identical to that shown; and,

FIG. 3 is a top plan view thereof.

The bottom side of the light vent unit being unornamented. 

An ornamental design for a light vent unit, as shown and described. 